Optical Joystick Recovery Structure for Accurate Center Return
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Solution Overview
Problem
Conventional optical joysticks suffer from inaccurate recovering motion due to non-parallel ends of the recovering component, leading to limited gesture operation and reduced detection accuracy over time or due to incorrect installation.
Innovation Solution
A joystick design featuring a stick head, actuating component, substrate, bearing base, resilient recovering component, and constraining component, where the constraining component is movably disposed inside the bearing base to constrain the moving direction and utilize rotation components for precise recovering motion, ensuring accurate detection and recovery of the stick head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the recovering component is used without a constraining component, then the structure is simple, but the recovering position becomes inaccurate due to non-parallel ends
Solution Approach 1:
A constraining component is introduced as an intermediary element between the resilient recovering component and the actuating component. This constraining component includes a constraining surface that contacts the resilient recovering component, guiding and constraining its movement along a predetermined path. This intermediary structure ensures the resilient recovering component moves parallel to itself, maintaining accurate recovering position without requiring complex manufacturing tolerances on the resilient recovering component's ends.
2Measurement precision
If the resilient recovering component moves without constraint, then the ease of operation is high, but the detection accuracy decreases due to imprecise recovering
Solution Approach 1:
The constraining component serves as a mediator that guides the resilient recovering component's movement. The constraining surface provides a predetermined movement path that ensures parallel motion, while the movable connection between the constraining component and actuating component maintains operational smoothness. This intermediary structure reconciles the need for precise detection accuracy with ease of operation.
Solution Approach 2:
The constraining component is movably connected to both the resilient recovering component and the actuating component, allowing dynamic adjustment during operation. This movable connection enables the system to maintain smooth operation while the constraining surface provides the necessary guidance for accurate recovering position.
3Measurement precision
If the ends of the recovering component are made parallel through precise manufacturing, then the recovering accuracy is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The constraining component acts as a mediator that transfers the parallelism requirement from the resilient recovering component to itself. The constraining surface is designed with parallel guiding surfaces that constrain the resilient recovering component's movement. This shifts the manufacturing precision requirement from the resilient recovering component to the constraining component, which can be manufactured with standard tolerances and still achieve accurate recovering.
Solution Approach 2:
The design changes the geometric parameters of the constraining component's constraining surface to provide a predetermined movement path. By designing the constraining surface with specific geometric features (parallel guiding surfaces), the system achieves accurate recovering without requiring high manufacturing precision on the resilient recovering component's ends.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design stabilizes the recovering function of the joystick, enhancing detection accuracy by constraining the moving direction of the resilient recovering component and utilizing rotation components to effectively return the stick head to its initial position, thus improving operational precision.
Implementation Method 1
the resilient recovering component is compressed to store a resilient recovering force; when the pressure applied to the handle is removed, the resilient recovering force of the recovering component moves the lever arm back to an initial mode
Data Source
AI summary
A joystick includes a stick head, an actuating component, a substrate, a bearing base, a resilient recovering component and a constraining component. The actuating component has a first end and a second end opposite to each other. The first end is connected to the stick head, and an identification feature is disposed on the second end. The substrate has a detection module used to detect the identification feature and determine motion of the stick head. The bearing base is disposed on the substrate. An opening portion of the bearing base aligns with the detection module and the actuating component. The resilient recovering component is disposed between the substrate and the bearing base. The constraining component is disposed on the resilient recovering component and movably disposed inside the opening portion, and used to abut against the actuating component in a detachable manner.